1H3L

N-terminal fragment of SigR from Streptomyces coelicolor

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1h3la_	All alpha proteins	Sigma2 domain of RNA polymerase sigma factors	Sigma2 domain of RNA polymerase sigma factors	Sigma2 domain of RNA polymerase sigma factors	Sigma factor SigR	(Streptomyces coelicolor A3(2) ) [TaxId: 100226 ],	SCOPe (2.08)
B	d1h3lb_	All alpha proteins	Sigma2 domain of RNA polymerase sigma factors	Sigma2 domain of RNA polymerase sigma factors	Sigma2 domain of RNA polymerase sigma factors	Sigma factor SigR	(Streptomyces coelicolor A3(2) ) [TaxId: 100226 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Sigma2 domain of RNA polymerase sigma factors	8030023	4003741	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Sigma2 domain of RNA polymerase sigma factors	8042402	3001393	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Sigma2 domain of RNA polymerase sigma factors	8042402	3001393	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Sigma70_r2_1	e1h3lA1	A: alpha complex topology	X: Sigma2 domain-like	H: Sigma2 domain of RNA polymerase sigma factors (From Topology)	T: Sigma2 domain of RNA polymerase sigma factors	F: Sigma70_r2_1	ECOD (1.6)
B	Sigma70_r2_1	e1h3lB1	A: alpha complex topology	X: Sigma2 domain-like	H: Sigma2 domain of RNA polymerase sigma factors (From Topology)	T: Sigma2 domain of RNA polymerase sigma factors	F: Sigma70_r2_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.1740.10	Mainly Alpha	Orthogonal Bundle	Rna Polymerase Sigma Factor	Chain: A	CATH (4.3.0)
B	1.10.1740.10	Mainly Alpha	Orthogonal Bundle	Rna Polymerase Sigma Factor	Chain: A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF04542	Sigma-70 region 2 (Sigma70_r2)	Sigma-70 region 2	Region 2 of sigma-70 is the most conserved region of the entire protein. All members of this class of sigma-factor contain region 2. The high conservation is due to region 2 containing both the -10 promoter recognition helix and the primary core RNA ...	Region 2 of sigma-70 is the most conserved region of the entire protein. All members of this class of sigma-factor contain region 2. The high conservation is due to region 2 containing both the -10 promoter recognition helix and the primary core RNA polymerase binding determinant. The core binding helix, interacts with the clamp domain of the largest polymerase subunit, beta prime [1,2]. The aromatic residues of the recognition helix, found at the C-terminus of this domain are though to mediate strand separation, thereby allowing transcription initiation [1,2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	RNA POLYMERASE SIGMA FACTOR	DNA binding binding organic cyclic compound binding nucleic acid binding transcription regulator activity DNA-binding transcription factor activity sigma factor activity	regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process cellular process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process DNA-templated transcription initiation response to oxidative stress response to stimulus response to stress	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR007627	RNA polymerase sigma-70 region 2	Domain
A, B	IPR013325	RNA polymerase sigma factor, region 2	Homologous Superfamily
A, B	IPR013324	RNA polymerase sigma factor, region 3/4-like	Homologous Superfamily
A, B	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR000838	RNA polymerase sigma factor 70, ECF, conserved site	Conserved Site
A, B	IPR014284	RNA polymerase sigma-70 like domain	Domain
A, B	IPR039425	RNA polymerase sigma-70 like	Family
A, B	IPR013249	RNA polymerase sigma factor 70, region 4 type 2	Domain
A, B	IPR014293	RNA polymerase sigma-70, actinobacteria	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.